Temperatures were read for the granular materials near and directly upon the heat transfer surface. The data obtained were used to calculate the values of the surface heat transfer coefficient (SHTC) for separately heating and cooling under varying rotational speed of the scrapers. The results indicate that the rotational speed had no significant influence over the surface heat transfer coefficient. The acquired data were transformed into a relation among dimensionless variables of the general form Nu = c1 ÆPe´
C2
. Relationships thus obtained can be used for calculations of the surface heat transfer coefficient in heat-exchangers with scraped-surface heat-exchange walls.